IRS has announced standard mileage rates for the year 2010.  Beginning with the new year, it will be 50 cents per mile for business miles driven for the use of a car.  

It will be 16.5 cents per mile driven for medical or moving purposes and 14 cents per mile driven in service of charitable organizations

For more details, please go to:

http://www.irs.gov/newsroom/article/0,,id=216048,00.html